Warp stop motion for looms



A. E. RHOADES.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JULY 16, 1921..

Patented Feb. 7, 1922;

2 SHEET$-SHEET I.

A. E. RHOADES. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JULY 16,192!- 1,4()5,441 Patented Feb. 7, 1922.

2 SHEETS-SHEET 2- T all whom it may concern:

U TE ,s

PA 'i -N; its.

RATION, or HOPEDALE, aressaoi-lnsnr'rs, A: COBPOBIATIONDE MAI-NE.

WARP s'ror iuo'rioii rora oci/is.

Be it known that I, ALONZO E. Riionniis, a citizen of the United States, residing at fslopedale, in the county of Worcester and State. of Massachusetts, have invented an- Improvement in WVarp top Motions for Looms, of which the following description,

iii/connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to warp stop motions for looms whereby the loom is brought to. rest when a warp thread becomes broken or too slack. i v

. One of theobjects of the present invention is toprovide. awarp stop motion which shall be simple in' construction and efficient in operation, and wherein the parts are so combined that no injuriouseflect is produced,

upon the warp detectors or drop wires. when a warp fault occurs and loom stoppage is effected. The presentainventionis a further development and improvement on the warp stop motion which forms the subject-matter ofthe' patent of'Alon'zo E, Rhoades, NumbeI 1385511., dated July 2 1921. I

j In the drawings:

Figure 1 is aperspective view of portions of a loom having the present invention associated therewith, some oftheparts being broken away; 1 I

Fig. 2 is a sectional side elevation showing some of the parts in section and in the position they occupy on the back or inactive stroke of the actuator;

is aside sectional elevation transversely of the loom showing the present in vention "associated therewith *and the stop.

motion being operated to-effect loom stop- Fig. 4 is a longitudinal section through the connection-between the movabletoothed bar and arm of the rocker;

Fig. 5 is an enlarged face view of the guide for the stop arm and associated parts; and

Fig. 6 is an enlarged sectional elevation of i the knock-off mechanism in the act of being ence to that'type' ofwarp stop motion where- Specification of Letters Patent.

. operated. by the. backward movement offthe' 501 I V" I v I The present'invention has special refer-- wires to effect loom stoppage when oneo'f Patented FebH751922. Application filed Ju1y 16,: 1921. Seria1 No.-4 8 5,156. i Y

bar (of which there may belone or more, as occasion may demand) is connected; to an lactuator through a rocker which moves with and is adapted tojrock upon theactuator,

but is normally held'from rocking movement by means such as a weight: so long as thee; .1 warp threadsare in normal condition. Con nected tothe rocker 1s a latch" which nor i ially moves; in a path of iifonengagementf with a stop-arm so-long as the warp threads are intact, but which, when'wawarp thread bGCOIHGS broken ortoo slack, is movedfby the-1'0 cker to engagciand efi'ect movement. of the stop arm to effect loom stoppage; a It is so netimes desirable in aloomhaving a warp stop motion, to. provide thelower oro cani-shaft with a number of trains of mechanism for shedding the warp, and under such conditions the operation of the.ac-"

tuatorfrom thetunder or cam shaft -.is un- Qdesirab-le land"one f the leaturesfpf the v I present invention as an improvement over the construct on of the prior patent-,l-con "sistsr n' operating the actuator fromflthe crank-shaft so that theftrain of mechanism. I

foroperating the actuatoris removed from interfering relation with the shedding mechf I anisnn 1 i V i The loom frame 1 ssupplied with sup-f porting means forfsustaining the toothed bars and some of the -associat ed parts and suchsupporting means, asshown in the -present invent1on.;,may beconveniently provided by brackets 2, one at eachzsideof the loom, to which may be adjustably secured thebansupporting bracketsB. In the present instancetheibrackets-S are provided.

with outwardly-extending lug portions 4 i provided'with slotsfi'through which passes the bolt" 6 for adjustably. connecting; the

bracket with/the brackets 2. This constr'uction provides a convenient means for attaching the bar-supporting brackets 3' to the side frames of the m, but it-is to'be Any :number ofj-the supporting fbars 7 suitabl tothe intended purposemay be em,

ployed, only one of such bars being shown as they are well understood features of a warp stop motion.

The brackets 3 are provided with the upstanding lug portions 8, to which are secured the fixed toothed bars 9, twootv such bars being shown, Fig. 1. Each of the fixed toothed bars 9 may comprise two members, although one may be sufficient in some instances, and .such bars are provided withteeth, Between the two members of the toothed bar 9 is a movable toothed bar 10,

also provided with teeth, and in the present instance facing in the opposite direction from the teeth on the fixed bars 9. The fixed bars 9 may be secured in lugs 8 of the brackets 8 by means of wing nuts 11 or other suitable securing means.

Mounted in suitable bearings 12 carried by the loom sides is the crank-shaft 13 having the usual pitman 14 connected thereto the lower portion of the loom frame, is the actuator 20 which, in the present instance o f the' invention'is contrived as an'a'r'm extending upwardly from its support 19 and connected at 21 with a link 22, the other end of which is connected at 23 with a pin eccentric with respect to the wormwheel 16. The pin 23 may be conveniently secured 1 to the face of the worm-wheel, the construc-' tion being such that as the worm-wheel 16 is rotated through the gearing connection with the crankshaft, the actuator will be given its detecting movements. In order that the actuator may be positioned suiticiently rearward of the crank-shaftto pre vent interferencetherewith, the actuator 20 is provided with an'extension 24 which is connected to thelink 22 at 21. Thus the gearing connecting the worm and wormwheel as described, to the crank-shaft, may be effected without interference with the shedding mechanism or other Y operating parts, and yet the actuator may be properly related with the crank-shaft and parts of the warp stop motion.

Mounted upon the actuator 20 is the rocker 25 which is bodily movable with and adapted to rock upon the actuator. In the present instance the rocker is mounted upon the actuator 20 by means of a pin 26 and has one arm 2.7 connected to the movabletoothed bar (one or more, hereinbefore described) and another arm 28 which carries a latch 29. V r

In the present form of the invention, where one of the toothed bars is fixed and the other is movable, injury to the warp detectors or drop wires is liable to occur when drop wire is released by a warp thread and locks the movable bar to the fixed bar. To avoid this undesirable condition, the rocker arm 27 is connected to the movable toothed bar or bars 1O by a yielding member 29. In the present 1nstance the member 29 comprises a head portion havin a stem 31 which extends 1on gitudiually througrh a casing The Stem 31 has an adjustable head; 33secured thereto within the casing 82, and between the head and the end of the casing is a spring 3%. The casing 32 has side projecting lugs or pins 35 wnich engage the slotted endportions of the movable toothed bars 10, two

in the present instance, and the head 30 of t 1e stem is pivotally connected to the arm 2i at 36, the construction being such that should a movable toothed bar 10 be arrested 7 arm 2? of the rocker against stop 38 forming part of or secured to the upper end portion of the actuator 20. v p V The latch 29 may be variously formci'hbut in the present instance it is shown as provided with a slot 39 through which extends a stop arm to having a projection or lug 41 which nia.y"'constitute a catch adapted to loom stoopa e. The sto arm 40 is mounted in a guide 42 which is provided with a slot 43 through which thestop arm ex ends, The opening in the guide 42 is enlarged at 4 1 to permit the stop arm to move not only longitudinally therein, but also to tilt to some extent under the action of the latch (see Fig. 5).

Vioun'tedupon the" bracket 4C2is a tube 45 through which extends the wire 16 which is encased orsurrounded'by an armor d7 of latch but. also a wei ht which ma Y i 60 tion shown, will move the stop arm back such size relative to the wire 46 as to permit the wire to move endwise in the armor 47, but prevent buckling when it ISIHOVGC]. lon- I "moves it longitudinally in the armor or casing 47.

The tube 45 may be conveniently secured in the bracket 42 by a bolt 49. As a convenient mechanical construction, the tube 45 may be mounted in a'block 50 preferably formed separate from'the bracket 42 and secured thereto by suitable bolts 51 as indicated in Fig.5. i Y

The wire 46 has its other end mounted in aubracket 52 by means oi a tube 53 which may be appropriately secured in the, bracket 52 by a bolt 54 and the end of the'wire 46 adjacent the bracket 42 bears-upon the/end of a plunger 55, the upper end of which rests against the under sideof a dog 56 piv-' oted at 57.0n an arm 58. which is .itself'pivotally supported on the bracket 52at 59.1 A spring 60.normally acts to' hold the dog 56 .in its lowered or inoperative position.

Mounted upon thelay .61 is a bunter 62 which is adapted to engage the dog 56 when the latter is :raised intothe path of the bunter as the lay goes back". Connected with Y the arm 58 is the link 63 which is connected tothe knock-off lever as more fully shown and described in the patent to Burbank, No.

1,240,666, dated September 18, 1917,, the construction being such that should the dog 56 be raised into the path of the bunter 62 as the lay goes back, the shipper will be knocked from its holding notch and the loom will bebrought to rest to enable the loom attendant to piece-up the broken orremedy the slack warp. thread.

The spring 60 which acts upon thedog 56 is suflicient in its action-to move the wire 46 end-of the wire from-the position indicated of Fig. 2,.and' thus relieve the pressure ofin F 3, means is provided for 1 insuring. movement of the stop-arm, in the'opposite direction after the 100m has been stopped, and the warp fault re1 nedied To this end" thestop arm is provided with a shoulder. 64

which, when. the latch 29 is returned to its initialposition as indicated 'inFig. 2 after a stopping action as indicated in Fig. 3, will engage the shoulder 64am] under the weight of the latchwhich turns "the rocker clockwise relative tothe actuator in the construc:

wardly-from theipositionin Fig. 3 to that the stop arm from against the wire 46. A

stop 65 onithe stop arm 40 limits the back! ward movement to inoperative: position.-,-o.f

the stop arm 40;

When the'loom is running threads in normal condition, the actuator will be moved back and forth through the 7 train of mechanism described, and carry with it the rocker 25-witho'ut causing rock- 1 ing movement of the rocker,"' and the-mov-i V abletoothed bar will be free for movement 'longitudinally.-, When, however, a warp .75

thread becomes broken Or toozslack, it'will lock; the fixed'and movable toothed-bars tolgether and thereby causerthe rocker 25 to rockupon the actuatorand liftthe latch 29 detector lhas', beenlifted'from the interlocking engagement withfthe fixed and, movable 5 toothed bars, the weight. ;0fthel latch 29 j upon the arm 28 will again restore -the rockerto its normal positionwith the arm 27-,bearing againstthe stop 3.8, andon the 99 backward ,movementjor the inactive stroke of the actuator, the latch will engage. the shoulder64 of the stop ,armiand move'it into its normalfor inoperative position,- as indicated-in Fig. s What-is claimed is :.,.1; A 1. Ina warp stop .n iot ion for looms, the combination of a fixed and alongitudinally movable toothedj bar, a series o f-rwarp detectors which are hung upon and. normally supported out; of engagement with thev toothed barsby the warp threads, an 'actu ator, a rocker mounted on the actuator for movement therewith and rocking movement thereon, connections between the rocker and movable toothed bar, means normally. act; ing to, hold the; rocker from rocking move-jiment and permitting such rocking movement whenthe movable toothed bar is held from longitudinal movement by a warp detector dropped bysa'i slack orb-roken warp movable. toothed bass series otwarpde- 20 tectors which are hung upon and normally supported out of engagement with .thetoothed barsb-y. the warp threads, an actuator, a rocker mounted'on theactuator forlmovement therewith and rocking movementthere 1 25 on connections between the rocker. and movabl e toothedbar,a stop arm'having a catch, Y w i h arr e byth e a no m lly m intained s pil ngegem nt w t the pater 7 until themovabletoothed bar is arr t y loo 1 ilio movement in a path out of engageiient with the catch as the rocker is bodily moved by the actuator, a series of warp detectors normally supported by the warp threads and adapted to arrest the movable toothed bar and cause the rocker to effect engagement of the catch and latch when one of the de 7 tectors is dropped by. a too slack or broken warp thread, and means for stopping the loom when the stop'arm is moved by the en gaged catch and latch. Y I

4-. In a loom, the combination of the crank-shaft, an actuator, a' rocker mounted on theactuator for bodily movement there with and rocking movement thereon, a fixed and a movabletoothed bar, connection between the rocker and movable toothed bar for reciprocating the movable bar when the rocker moves bodily with but fails to rock on'the actuator,a toothed wheel on the crank shaft, a toothedactuator wheel engaged with the toothed wheel on the crank-shaft, connections between the actuator wheel and the actuator for operating the latter from the crank-shaft, a series of warp detectors adapted to be supported by'the warp threads and to arrest movement of themovable toothed bar when one of the detectors is released by a warp thread. i

5. In a warp stop motion for looms, the combination of the loom crank shaft having a worm thereon, a worm-wheel engaged therewith, an actuator connected to the worm-wheel and carrying a rocker, a' fixed and a'movable toothed bar, connections between the movable toothed bar and the rocker for reciprocating the toothed bar, a

stop arm having-a 'catch, a latch carried by the rocker which is engaged with the catch of the stop arm'and effects movement of the latter only whenthe rocker is rocked upon the actuator, and a series of warp detectors which-are normally supported by the Warp threads and adapted to arrest movement of the movable toothed bar and cause rocking movement of the rocker on the actuator when one of the detectors is released by a warp thread. g V

. 6. In a warp stop motion for looms the combination of afixed toothed bar,-a movable toothed bar, a series of warp detectors which are hung upon andnormally supported in raised position by the warp threads, an actu- -ator, a rocker mounted on the actuator and tion and an idle stroke in the opposite direction, means normally acting upon the rocker to prevent rocking movement of the rocker as the actuator makes its detecting stroke and permit such rocking movement without injury to a warp detector when a warp detector is dropped by a warp thread breaking or becoming too slack, and means operated on the detecting stroke of the actuator to effect loom stoppage when the movable toothed bar is arrested by a detector.

7.111 a warp stop motion for looms, the combination of a fixed toothed bar, a movable toothed bar, a series of'warp detectors which are hung upon and normally supported in raised position by the Warpthreads, an actuator, a rocker mounted on the actuator and connected to the movable toothed bar, a latch carried by the rocker, a stop arm which is adapted to be engaged and moved by the latch when the rocker is rocked on the" actuator by obstruction to movement of the connected toothed bar due to a warp detector released by a broken or abnormally slack warp thread, and means for stopping the loom when the stop arm is moved by the latch.

S; In a warp stop motion for looms, the combination of a fixed toothed bar, a movable toothed bar, a series of warp detectors which are hung upon and normally supported in raised position bythe warp threads, an actuator, a rocker mounted on the actuator and connected to the movable toothed bar, an

arm carried by the rocker and having a latch, a stop arm normally out of the path of movement of the latch until the rocker is rocked on the actuator and then acting to eitect movement of the stop arm, and means for stopping the loom when turning movement of the rocker causes the latch to engage and move the stop arm. i

9. In a warp stop motion for looms, the combination of a fixed toothed bar, a movable toothed bar, a series of warp detectors which are hung upon and normally supported in raised position by the warp threads, an actuator, a rocker mounted on.

' loom stoppage when the latch engages and moves the stop arm.

10. In a Warp stop'motion for looms, the combination of a fixed and a movable toothed bar, a series of warp detectors which are hung upon the warp threads and normally supported in raised position, an actuator, a rocker mounted on the actuator and havlng two arms, one connected to themovable toothed bar and the other carrying a latch, a stop arm adapted to be engaged and moved by the latch when the rocker is rocked upon ALONZO E.-RHOADES. 

